Safety guard for presses



Mar". 13, 1923. 1,447,9s7 t w. M. JOHNSON SAFETY GUARD FOR PRESSES Filed June 28, 1922 2 sheets-sheet l INVENTO R Mm/%gazz 755%;020;

I V I ATTORNEYS..

Mar. 13, 1923. 1,447,987 w. M. JOHNSON SAFETY GUARD FOR PRESSES Filed June 28, 1922 2 sheets-sheet 2 INVENTOR 02* 0226751225022;

Patented Mar. 13, 1923.

ras

WILLIAM MORGANJO-HNSON, or NEWARK, NEW. JERSEY.

SAFETY GUARD FOR PRES SES; I

Application fi led-June 28,

This invention relates to safety guards for presses, such as metal stamping presses, in which there are a plurality of relatively movable engaging parts or dies for operatiOn upon work which is manually fed to said engaging parts by an operator, said gu guard being designed to preventthe oper- 1 ators hands from becoming accidentally caught between and injured by said'parts. J

The primary object of the invention is to provide a safety guard of this character embodying novel features of construction especially for use with presses of the typein which the operator only feedsthe work material to the dies and is not required to pass his hands between the dies to remove the finished work. i

Further objects of the invention are t provide a. safety guard of the character described adapted to be fixedlyrinounted in relation to the die which supports the work material t normally enclose the zone of engagement of the dies; to provide such a device which can be adjusted to permit material of different thicknesses to be passed between it and said die which supports the work material and at the same time prevent the fingers of the operator from'entering between said dies; to provide'a safety guard of this character having a portion removable or displacable to permit access to said d es when such is necessary; to thus provide a gu safety guard including a supporting frame v adapted to be mounted on a press in fixed relation to the material supporting die, and a guard portion mounted on said frame to enclose the zone of engagement of said dies and adjustable relatively to said material supporting die; to provide suchasafety guard in n 'hicha portion of-saidguard'memher is hingedly mounted to provide access to said dies, and to obtain other results and advantages as may be brought out by the following description. I

Referring to the accompanying drawings,

in which like numerals of reference -indicatethe same parts throughout 'the several. I I j j g I or sheet of, metal, uch' as alum inuin, the

views,

Figure 1 a pers'pective view of a safety guard constructed in accordance with my i -I vention showing the manner of app ying the same t one ,type of metal stamping press; Figure 2 isan enlarged front elevation MATE'NT OFF-W1.-

of the guard detached from, thepress with I the shield of the guard member removed FigureB is a front elevation of the shield;

Figure 4: is a side. elevation of the safety guard, portions of the shield beingshown in section;

.Figure'5is a verticalsectional'view taken on theiline of Fig. 6 with one of the lde rods removed and por tions of v theshield broken away, V Flgure 6 is a top plan view of the safety guard, portions being shown in section, and

Figure 7 is a detail sectional view of the mountingo'f the body portion ofthe guard member on'the guide rods.

, Forthe purpose of illustrating the princifl ples of my invention 1 have shown my safety guardiused in connection with a wellgknjown type of metal stamping and punching press which includes, a table A, a lower work supporting die and an upperreciprocating stamping or punching die C adapted to cooperate with the lower die B instamping.

or punching sheet metal. "In this form of press, the sheet metal'to be operateaa m is manually fed over the'llower die B by the operator,'and it is unnecessary for the operator to place liis hands between the die members B and C "to remove "the finished The safety guard'embodying invention comprises a frame including a base plate 1 adapted .to'be secured to the table of the pressand provided with a pair of spaced I ide 'rod sl2 rigidly secured atone "end to the base plate and jarrang'ed'at substantially "rightangles thereto. The'rods 2 are threaded from their freeends for a portio Of their lengths and are provided withnuts 3 to cooperate with theguard member of the safety guard; The base plate 1 may be secured "to the, table "of the press in any suitable manner, vbutin the present instance I 'h'ave shown the plate formed with aslot 4 through which pass'esa cap screw 5 into the table The guard member includes a "body portion 6 whichmay "be in the form of aboard r'ule press,'the1:'s1ot,4: ienablingthebase j l plate to be adjustedrelatively toithe; lower one longitudinal edge of the-shield.

thereof brackets? which are slidable on the respective guide rods 2. Adjacent the other end of said body portion are secured other brackets 8 also slidably mounted on the guide rods, said brackets 7 and 8 providing for adjustment of the body portion (5, of the guard member longitudinally of the guide rods'2 and preventing swinging of the body portion or binding of any of the brackets on the guide rods. Movement of the body portion 6 toward the free ends of the guide rods is limited by engagement of the brackets 7 with the nuts 3, and for the purpose of automatically influencing the body portion toward the free; ends of the guide rods compression springs 9 are interposed between the brackets 8 and the' 'base plate 1'. To prevent vibration of the body portion 6 and movement toward the base plate 1 on the guiderods I may provide set screws 10 in the brackets? to engage the rods2. A shield 11 is mounted on the body" portion 6 of the guard m'emberand is adapted to cooperate therewith to enclose the zone of engagement of the. die members B and C. The said shield may be of any suitable construction, but'I preferably form the same of celluloid, mica, or wire mesh, so that the operator can watch the operation of the dies on the work,and said shield ispreferably substantially semi-elliptical in cross-section as shown in Figure The shield 11 is re movably and hinged mounted on the body portion 6, and for this v purpose I have shown a strip'of sheet metal 12 returned upon itself to form a hinge sleeve 13, the said striplbeing riveted or otherwise suitably secured to A hinge pintle or rod 14: is adapted to loosely fit in the hinge sleeve 13 and one 'endthereof removably fitswithin a socket member 15 securedto the body portion 6 adjacent the inner end thereof. -VV ith this construction it will be observed that by removing the hinge pintle 14 from the-socketmembeiilt'i the shield ll may be bodily removed from the-body portion 6, and that the shield may be swung on the hingepintle 14 away from the body portion, as shown. by dotted lines in Figure 6, to provide access'to the die members B and C or the work "between the same. To hold the shield 11 against swinging, I'may formthe edge thereof opposite the hinge with catches 16 adapted to v.en gage a keeper rod 17 mounted on the-body portion 6. Thesaidcatches-maybeot any suitable construction but in the'present i1 1- stance are adapted to bs/ held inengagement with the. keeper rod -17 by.theinherentresiliency ofthe shield .11 .jWhen the shield is made of mic/a; or cellu1oid',"I may provide the transverse edges thereof with reenforc ing strips 18 of metal to protect the same against injury, and said strips also increase the rigidityof the shield.

In the operation of the safety guard, the same is secured to the table A of the press by means of the cap screw 5 with the guide rods 2 arranged at opposite sides of the lower die B. The shield llis then secured to the body portion 6 by means of the hinge pintle 14 and the body portion is adjusted by means of the nuts 3 and set screws 11} so that the lower edge of the shield is spaced a sufiicient distance from the lower die to permit the work material to pass between the lower edge of the shield and the said die, It will thus be seen that the shield 11 en closes the zone of engagement of the die members B and C and prevents the fingers of the operator from entering between the said dies; and, furthermore, the safety guard being fixedly mounted with relation to the die member B, it is impossible for the hands of the operator to become caught 1 between the safety gnard and the said die member.

lVhile I have shown a safety guard embodying certain details of construction, it I will be understood that this only for the ing relatively movable engaging members,

of a frame fixedly mounted relatively to one of said members, a guard member ad ust- Therefore, I do ably mounted on said frame to normally enclose the zone of engagement of said relatively movable members, and means for, adjusting said guard member on said frame relatively to said one of said relatively movable press members to permit material of various thicknesses to be inserted thGIGbG- tween.

2. The, combination with press including relatively movable engaging members,

of a frame comprising a base plate having a pair of spaced guide rods mounted there on, said base vplate being adapted to be mounted on said press in fixed relation to one of said relatively movable members, a

guard. member slidably mounted on said rods tov normally enclose the zone of engagement of sa d press members, said guard member being adjustable relatively to said. one of said press memberS and means for holding said guardmember in adjusted position.

3. The combination with a press including relatively movable engaging members, of a irame comprising a base plate having a pair oi? spaced guide rods mounted thereon, said base plate being adapted to be mounted on said press in fixed relation to one of said relatively movable members, a guard member body portion slidably mount ed on said rods, and a shield removably mounted 011 said body portion to normally enclose the zone of engagement of said press members.

4 The combination With a press including relatively movable engaging members, of a frame comprising a base plate having a pair of spaced guide rods mounted thereon, said base plate being adapted to be mounted on said press in fixed relation to one of said relatively movable members, a guard member slidably mounted on said rods to normally enclose the zone of engagement of said press member, springme-ans for normally sliding said guard member in one direction away from said one of said press members, and means for adjusting said guard member in the opposite direction.

5.. A safety guard for presses including a base plate having a pair of spaced threaded guide rods mounted thereon, a guard mem ber slidably mounted on said rods to normally enclose the zone of engagement of said 6. The combination with a press includ-v ing a fixed member and a movable member to cooperatively engage said fixed member, of a frame having a pair of spaced guides and fixedly mounted on said fixed member, and a guard member slidably mounted on said guides and adjustable toward and from said fixed member, said guard member being adapted to normallyenclose the zone of engagement of said fixed member and movable member of the press and independent of said movable member.

7. A safety guard for pressescomprising a frame including a base plate having a pair of spaced guides thereon, a guard member body portion slidably mounted onsaid guides and carrying a pair of spaced rods, a curved shield to normally enclose the zone of engagement of a plurality of relatively movable engaging press members, and means at the edges of said shield for detachably it mounting said shield on said rods on the body portion. WILLIAM MORGAN JOHNSON. 

